I've had a fair amount of Kahr pistols... but only in 9mm or .45ACP. I agree with one of the other posters... I think the 9mm Kahr is the sweet spot in their lineup, based on size, handling, and reliability.
I've owned something like 5 CW9's, and still own 3 of them. They are my EDC pistols, and I rotate them about every 2 months. I gave one away to my brother (birthday present,) one shot quite a bit left (sold,) leaving the 3 best ones for me. My first CW9 was bought used, from my FFL, at a good price. I bought it with the intention to test drive a poly 9, and I was already predisposed to hate it... not only because it was poly, but 9mm as well. Real guns are metal, right? Wrong. My first range session and I fell in love with the stupid thing....
That original pistol was actually stolen out of my truck (because all you need to break into a SuperDuty is a .99 flat blade screwdriver,) so I had to scramble during one of the Dark Ages (Obama) and I finally found the last CM9 at the gunshow. I wasn't particularly enthralled with the smaller CM, but it packed well, took all of the same magazines and holsters as the CW9, and I had one. First chance I got, I picked up another CW9... because one is none, and two is one. And then I bought another CW9... the one that shot left. So I sold that one... and bought another CW9... because three is two. Oh, look! Another CW9! ...let's get it!
During this time, I also picked up one of my dream Kahrs... a P45! It sure looked good on paper, but it never really fit my hands well, and, honestly, it had problems. I think it was short chambered.. but Kahr was not willing to let me ship it on their dime, so I took the easy way out... I traded it off... for another CW9 and some magazines. I eventually bought another Kahr .45... a CW45. While it was more reliable than my P45, it never really lit my fire... and I sold it off, too. I also bought a PM9, which isn't a bad pistol... but the slide release/cam pin has a habit of walking out under recoil. I'm sure it's an easy fix, but I haven't bothered with it, yet.
I've been told the K9-series pistols are the best, but given the price tag, it's unlikely I'll ever get one unless I just luck out. I see a lot of used Kahrs, both steel and poly, at my LGS, but they are almost always .380's, .40's, or .45's... and that holds no interest to me. I see very few 9mm Kahrs for sale.
I have 4 different holsters I use to tote my Kahrs around...
The self-modified Galco IWB pictured above...
The High Noon Slide Guard... just a fantastic holster...
I liked the High Noon so much, I bought one for my 1911's...
When I travel, I prefer the Alessi shoulder holster... it's a lot of holster for such a small gun, but it gives me access while seated, and I don't have to fight with it when I put my seatbelt on...
I also have a very nice Alessi IWB clip holster... it's a little more bulky than my Galco, but it's rigid enough where I can reholster without going through gyrations (no photo.)
Epilogue: I mentioned above that my original Kahr CW9 was stolen out of my truck. It was, of course, picked up during a bust. After a few years I kind of had written it off... as lost in the bueraucratic never-never land. Lo and behold... 7 years after the fact, I get a call from the local PD... "you want to come and pick your pistol up?" Why... yes I do!
One small scratch across the slide... but otherwise unmolested! It even had it's magazine...